Fluid-tight joint for rotary valve-stems.



J. E. WILLCOX.

FLUID TIGHT JOINT FOR ROTARY VALVE STEMS.

APPLICATION FILED MAB. 9,1911

1,008,398. Patented N0v.14, 1911.

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J. E. WILLGOX.

FLUID TIGHT JOINT FOR ROTARY VALVE STEMS.

APPLICATION FILED MAB. 9, 1911.

Patented Nov. 14,1911.

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Be it known that I, James E. Wmncox, a citizen of the United States, anda resident of Malden, in the county of Middlesex and State ofMassachusetts, have invented a new and useful Improvement in Fluid-TightJoints for .Rotary Valve-Stems, of which the following is aspecification.

My inventlon relates to fluid-tight joints for rotary valve stems, andits .object is to provide a joint whereby the metallic or other packingheretofore employed may be eliminated.

Heretofore in steam or other fluid-tight joints for. rotary valve rods,excessive pressure exerted on the packing has sometimes caused relativemovement tween the rod and the packing with the result that the rodbecame scarred and the' packing injured and rendered ineffective. Bmeans of the present invention I am enab ed to overcome these defects.

In the drawings which accompany and form a part of this specificationIhave illustrated two embodiments of my invention as applied to rotaryvalve stems; but it will be understood that it is not limited to usetherewith.

In'the drawings, Fi' re 1 is a longitudinal vertical section 0 oneembodiment of my invention. Fig. 2 is a transverse section taken on theline 2-42 of Fig. 1. Fig. 3 is a horizontal section taken on the line3-3 of Fig. 1. Fig. 4 is a face view of the rear sleeve-driving device.Fig. 5 is a'longitudh nal vertical section of a modification. Fig. 6 isa transverse section taken on the line 6-6 of Fig. 5

In the particular drawings selected for more fully disclosing myinvention, 1 represents the bonnet of a rotary valve-stem in which thevalve rod 2, provided with a tapp'et 20, is journaled for rotary motion.The forward face of the sleeve 3, located in a socket in the base of thebonnet, is provided with one or more slots 4 4 and one or more bores 55-, in each of which a shortspiral spring is located. By a set screw 6or other suitable means, the sleeve 3 is secured to the valve rod.

7 is a sleeve surrounding the valve rod and provided at its rearward endwith a flange 8 and with one or more lugs 9 9 which are arranged tocooperate with the .slot or slots 4 4'. When the cover plate 11,

which preferably incloses the projectingend of the sleeve 3, is securedto the base of the bonnet b the bolts 12, said lugs are forced into teir corresponding slots, and the springs in said slots as well as thesprings in the bore or'bores 5 5' are suitably compressed, so that asteam-tight joint is effected between the flange 8 of the sleeve and tiecover plate. Preferably the outer side of tee flange 8 is rounded and acorrespondingly shaped washer 10, is interposed between said flange andthe cover plate to form a ball a1 16. socket joint.

A packing rin 17 of suitable materi l, such as soft meta or fiber, isplaced around the shaft in front of the forward beveled end of thesleeve 7 and compressed against the same by the nut 15 threaded on thesleeve. A sle' 13, rovided with one or more end slots :11, is p acedover the forward end of the sleeve 7 and secured thereto by the setscrew 14 or by other suitable means. When the nut 15 has beensufiiciently tig: 1tened, it is locked in position by the set'scr aw 16,which is threaded into the sleeve 13. The winged collar 18 secured tothe rod by the set screw 18', is so arranged that its wing or wings 18"take into the slot or. slots 19 above stated cooperates with the lugs 99',

constitutes the rear driving means for said sleeve,'so that under nocircumstances :an any relative rotational movement be created betweenthesleeve 7 and the valve rod. It will be understood of course that I donot limit myself to the use of both forward and rear drives and mayemploy only one.

In Fig. 5 I have shown a modification in which the forward drive only isemployed. In this case the sleeve 7 is provided with a flange 23. whichis rectangular in section and which takes against the front wall of thebushing .22 inserted in the base of the' bonnet and held in position bythe screws 12' which pass through the cover plate 21 and into the baseof the bonnet. Interposed between the flan e 23 and'cover plate is awasher 24 provi ed with one or more pins 25, each of which is surroundedby a short spiral spring inclosed within a socket in said cover plate.When the parts are in position, the pressure exerted by the springscreates a steam-tight joint between-the flange of the sleeve 7 and thebushing 22. Here again it willbe seen that no relative rotational motioncan be created between the sleeve and valve rod.

It will be obvious that the fluid-tight joint above described is notlimited to use in steam apparatus, and that various modifications may bemade by those skilled in the art in the particular devices illustratedwithout departing from the spirit of my invention. 1

I claim:

1. In a fluid-tight joint for rotary valve stems, a valve rod, a sleeveon said rod,

means for making a fluid-tight joint between said rod and sleeve,.driving means secured to said rod, a member secured to the forward endof sa1d sleeve and cooperating with said drivlng means, other drivingmeans secured to said rod, and means op'er-' atively connecting therearward end of said sleeve with the last mentioned driving notchessecured to the forward end of said I sleeve, and a winged collar securedto said rod and arranged to cooperate with-said notches.

4. In a fluid-tight joint for rotary valve stems, a valve rod, a flangedsleeve thereon,

a sleeve'secured to said rod and having itsforward face provided withslots, lugs on the rearward. face of the flange o f said flanged sleeve,said lugs arranged to cooperate with said slots, and a spring in each ofsaid slots.

5. In a fluid-tight-joint for rotary valve stems, a valve rod, a flangedsleeve thereon, a sleeve secured to said rod, a washer interposedbetween the forward face of the flange of said flanged sleeve and astationary part of the joint, and means acting against the rearward faceof said flange to exert pressure between the forward face ofsaid flangeand said washer and between said washer and i said stationary part. I

6. In a fluid-tight joint for rotarywalve stems, a valve rod, a sleeveprovided with a flange on said rod, driving means secured to said rod, amember secured to the forward end of said sleeve and cooperating withsaid driving means, abushing located in a stationary part of said jointand carrying said rod, and means acting against the forward face of saidflange for exerting pressure between the latter and said bushing.

7. In a. fluid-tight joint fora rotary valve stems, a valve rod, asleeve provided with a flange onsaid rod, a bushing inserted in astationary part of said joint and affording a bearing for said rod, acover plate for said bushing, a plurality of sockets therein, a springin each of said sockets, a washer interposed between said flange andcover plate, and a plurality of pins on said washer each projecting intooneof said sockets.

8. In a fluid-tight joint for rotary valve stems, a valve-rod, a sleevesurrounding said rod and provided with a rounded flange, acorrespondingly rounded washer interposed "between the roundedportion ofsaid flange and a stationary part of the joint, and means acting againstsaid flange to exert pressure between the same and said washer andbetween said washer and said stationary part for the purpose ofeffecting a steam-tight joint between said flange, washer, andstationary part. i

In testimony whereof, I have hereunto subscribed my name this 8th day ofMarch 1911.

JAMES E. WILLCOX.

Witnesses:

CHARLES WEAR, Gno. K. Woonwoncrn.

